Nissan Murano Z51. Manual — part 261
BCS
COMBINATION SWITCH READING SYSTEM
BCS-11
< SYSTEM DESCRIPTION >
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Operation Example
In the following operation example, the combination of the status signals of the combination switch is replaced
as follows: INPUT 1 - 5 to “1 - 5” and OUTPUT 1 - 5 to “A - E”.
Example 1: When a switch (TURN RH switch) is turned ON
• The circuit between INPUT 1 and OUTPUT 5 is formed when the TURN RH switch is turned ON.
• BCM detects the combination switch status signal “1E” when the signal of OUTPUT 5 is input to INPUT 1.
• BCM judges that the TURN RH switch is ON when the signal “1E” is detected.
Example 2: When some switches (turn RH switch, front wiper LO switch) are turned ON
• The circuits between INPUT 1 and OUTPUT 5 and between INPUT 1 and OUTPUT 3 are formed when the
TURN RH switch and FR WIPER LOW switch are turned ON.
• BCM detects the combination switch status signal “1CE” when the signals of OUTPUT 3 and OUTPUT 5 are
input to INPUT 1.
• BCM judges that the TURN RH switch and FR WIPER LOW switch are ON when the signal “1CE” is
detected.
WIPER VOLUME DIAL POSITION
BCM judges the wiper volume dial 1 - 7 by the status of WIP VOLUME 1, 2 and 3 switches.
JMMIA0294GB
JMMIA0295GB
Wiper volume dial position
Switch status
WIP VOLUME 1
WIP VOLUME 2
WIP VOLUME 3
1
ON
ON
ON
2
ON
ON
OFF
BCS-12
< SYSTEM DESCRIPTION >
COMBINATION SWITCH READING SYSTEM
NOTE:
For details of wiper volume dial position, refer to
WW-5, "WITH RAIN SENSOR : System Description"
(with rain sensor),
OUT RAIN SENSOR : System Description"
(without rain sensor).
3
ON
OFF
OFF
4
OFF
OFF
OFF
5
OFF
OFF
ON
6
OFF
ON
ON
7
OFF
ON
OFF
Wiper volume dial position
Switch status
WIP VOLUME 1
WIP VOLUME 2
WIP VOLUME 3
BCS
SIGNAL BUFFER SYSTEM
BCS-13
< SYSTEM DESCRIPTION >
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SIGNAL BUFFER SYSTEM
System Diagram
INFOID:0000000005681336
System Description
INFOID:0000000005681337
OUTLINE
BCM has the signal transmission function that outputs/transmits each input/received signal to each unit.
Signal transmission function list
JMMIA0298GB
Signal name
Input
Output
Description
• Ignition switch ON signal
• Ignition switch signal
Push-button ignition switch
(Push switch)
• IPDM E/R (CAN)
• Driver seat control unit (CAN)
• Automatic back door control
unit (CAN)
Inputs the push-button ignition
switch (push switch) signal and
transmits the ignition switch sta-
tus judged with BCM via CAN
communication.
Door switch signal
Any door switch
• Combination meter (CAN)
• IPDM E/R (CAN)
• Driver seat control unit (CAN)
Inputs the door switch signal
and transmits it via CAN com-
munication.
Oil pressure switch signal
IPDM E/R (CAN)
Combination meter (CAN)
Transmits the received oil pres-
sure switch signal via CAN
communication.
Stop lamp switch signal
• Stop lamp switch
• ICC brake hold relay (With
ICC)
TCM (CAN)
Inputs the stop lamp switch 1
signal, and stop lamp switch 2
signal or ICC brake hold relay
(with ICC) signal, and transmits
it via CAN communication.
Interlock/PNP switch signal
TCM
IPDM E/R (CAN)
Inputs the selector lever P/N po-
sition signal, and transmits the
interlock/PNP switch signal via
CAN communication.
BCS-14
< SYSTEM DESCRIPTION >
POWER CONSUMPTION CONTROL SYSTEM
POWER CONSUMPTION CONTROL SYSTEM
System Diagram
INFOID:0000000005518272
System Description
INFOID:0000000005518273
OUTLINE
• BCM incorporates a power saving control function that reduces the power consumption according to the
vehicle status.
• BCM switches the status (control mode) by itself with the power saving control function. It performs the sleep
request to each unit (IPDM E/R, combination meter, driver seat control unit and automatic back door control
unit) that operates with the ignition switch OFF.
Normal mode (wake-up)
- CAN communication is normally performed with other units
- Each control with BCM is operating properly
CAN communication sleep mode (CAN sleep)
- CAN transmission is stopped
- Control with BCM only is operating
Low power consumption mode (BCM sleep)
- Low power consumption control is active
- CAN transmission is stopped
LOW POWER CONSUMPTION CONTROL WITH BCM
BCM reduces the power consumption with the following operation in the low power consumption mode.
• The reading interval of the each switches changes from 10 ms interval to 60 ms interval.
Sleep mode activation
• BCM receives the sleep-ready signal (ready) from IPDM E/R and combination meter via CAN communica-
tion.
• BCM transmits the sleep wake up signal (sleep) to each unit when all of the CAN sleep conditions are ful-
filled.
• Each unit stops the transmission of CAN communication with the sleep wake up signal. BCM is in CAN com-
munication sleep mode.
• BCM is in the low power consumption mode and perform the low power consumption control when all of the
BCM sleep conditions are fulfilled with CAN sleep condition.
JPMIA0906GB
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